upd17

examples/listen_on_anyaddr.v

@@ -1,5 +1,16 @@
 import netio
 
+// This program starts a server that listens for TCP connections on port 1081.
+// The program listens on all addresses available in the operating system,
+// including IPv4 and IPv6.
+//
+// Run the program and try connecting using the telnet utility:
+//
+//     telnet 127.0.0.1 1081   # IPv4
+//     telnet ::1 1081         # IPv6
+//
+// This program fails if operation system does not support IPv6 or IPv6 is disabled.
+
 fn main() {
 	// We want to bind a server socket to the all available local addresses,
 	// (both IPv4 and IPv6) so collect the address info entries for it.
@@ -58,43 +69,37 @@ fn main() {
 
 	println('Listening on ${listen_addr}...')
 
-	// Accept the connection from remote. This is a blocking call.
+	for {
-	// conn will store the new socket connected to the remote.
+		// Accept the connection from remote. This is a blocking call.
-	conn, remote_addr := socket.accept() or {
+		// conn will store the new socket connected to the remote.
-		eprintln('ACCEPT: ${err}')
+		conn, remote_addr := socket.accept() or {
-		exit(1)
+			eprintln('ACCEPT: ${err}')
+			exit(1)
+		}
+
+		// Close connection on exit.
+		defer {
+			conn.close() or { panic(err) }
+		}
+
+		// Get remote host and port in numeric format.
+		remote_host, remote_port := netio.name_info(remote_addr,
+			flags: netio.ni_numerichost | netio.ni_numericserv
+		)!
+
+		eprintln('Accepted connection. Remote address: ${remote_host}, remote port: ${remote_port}')
+
+		// Read 512 bytes of data from socket.
+		mut buf := []u8{len: 512} // Initialize the buffer to store message.
+		// Receive data and write it to the buffer.
+		read := conn.recv(mut buf, 0) or {
+			eprintln('RECV: ${err}')
+			exit(1)
+		}
+
+		// Create a string from buffer without the trailing zeros.
+		msg := unsafe { tos_clone(buf.data) }
+
+		eprintln('Received from client: ${read} bytes, data: ${msg}')
 	}
-
-	// Close connection on exit.
-	defer {
-		conn.close() or { panic(err) }
-	}
-
-	// Get remote host and port in numeric format.
-	remote_host, remote_port := netio.name_info(remote_addr,
-		flags: netio.ni_numerichost | netio.ni_numericserv
-	)!
-
-	eprintln('Accpeted connection. Remote address: ${remote_host}, remote port: ${remote_port}')
-
-	// Read 512 bytes of data from socket.
-	mut buf := []u8{len: 512} // Initialize the buffer to store message.
-	// Receive data and write it to the buffer.
-	read := conn.recv(mut buf, 0) or {
-		eprintln('RECV: ${err}')
-		exit(1)
-	}
-
-	// Create a string from buffer without the trailing zeros.
-	msg := unsafe { tos_clone(buf.data) }
-
-	eprintln('Received from client: ${read} bytes, data: ${msg}')
-
-	// Send reply to the client.
-	sent := conn.send(msg.bytes(), 0) or {
-		eprintln('SEND: ${err}')
-		exit(1)
-	}
-
-	eprintln('Sent to the client: ${sent} bytes, data: ${msg}')
 }